An in-depth explanation of RxJava_07 [Multi-threading & auxiliary operations (End)]

Observable
    .create(new Observable.OnSubscribe<String>() {
        @Override
        public void call(Subscriber<? super String> subscriber) {
            //RxComputationScheduler-1
            Log.i(TAG, "call: "+Thread.currentThread().getName());
            subscriber.onNext("Hello Android !");
        }
    })
    //指定被观察者在哪个线程中运行
    .subscribeOn(Schedulers.computation())
    //指定观察者在哪个线程中运行
    .observeOn(Schedulers.io())
    .subscribe(new Action1<String>() {
        @Override
        public void call(String s) {
            //RxIoScheduler-2
            Log.i(TAG, "subscribe call: "+Thread.currentThread().getName());
            Log.i(TAG, "subscribe call: "+s);
        }
    });

//模拟在子线程执行任务
Scheduler.Worker worker = Schedulers.newThread().createWorker();
worker.schedule(new Action0() {
    @Override
    public void call() {
        //call:---RxNewThreadScheduler-1
        Log.i(TAG, "call:---"+Thread.currentThread().getName());
    }
});

final Scheduler.Worker worker = Schedulers.newThread().createWorker();
Subscription mySubscription = worker.schedule(new Action0() {

    @Override
    public void call() {
        while(!worker.isUnsubscribed()) {
            Log.i(TAG, "do your work !");
            //执行完任务后取消订阅状态
            worker.unsubscribe();
        }
    }

});

Observable
    .create(new Observable.OnSubscribe<String>() {
        @Override
        public void call(Subscriber<? super String> subscriber) {
            subscriber.onNext("Hello");
            subscriber.onNext("Android");
            //如果发送异常 则直接抛出异常 上面的发送无效
            //subscriber.onError(new NullPointerException("MOCK"));
            subscriber.onNext("Android2");
        }
    })
    //整体延迟2秒
    .delay(2000, TimeUnit.MILLISECONDS)
    .subscribe(new Action1<String>() {
        @Override
        public void call(String s) {
            Log.i(TAG, "call: " + s);
        }
    });

Observable
    .create(new Observable.OnSubscribe<String>() {
        @Override
        public void call(Subscriber<? super String> subscriber) {
            subscriber.onNext("Hello");
            subscriber.onNext("Android");
        }
    })
    //延迟2秒订阅
    .delaySubscription(2,TimeUnit.SECONDS)
    .subscribe(new Action1<String>() {
        @Override
        public void call(String s) {
            Log.i(TAG, "call: " + s);
        }
    });

    Observable
        .just("Hello","Android")
        //每发送一次 就会现在Observer的onNext()中调用一次
        .doOnEach(new Observer<String>() {
            @Override
            public void onCompleted() {
                Log.i(TAG, "onCompleted: ");
            }

            @Override
            public void onError(Throwable e) {
                Log.i(TAG, "onError: ");

            }

            @Override
            public void onNext(String s) {
                Log.i(TAG, "onNext: "+s);
            }
        })
        .subscribe(new Action1<String>() {
            @Override
            public void call(String s) {
                Log.i(TAG, "call: " + s);
            }
        });

com.m520it.rxjava I/IT520: onNext: Hello
com.m520it.rxjava I/IT520: call: Hello
com.m520it.rxjava I/IT520: onNext: Android
com.m520it.rxjava I/IT520: call: Android
com.m520it.rxjava I/IT520: onCompleted:

Observable.just(1, 2, 3)
    .doOnNext(new Action1<Integer>() {
        @Override
        public void call(Integer item) {
            Log.i(TAG, "doOnNext call: "+item);
        }
    }).subscribe(new Action1<Integer>() {
        @Override
        public void call(Integer integer) {
            Log.i(TAG, "call: "+integer);
        }
    });

com.m520it.rxjava I/IT520: doOnNext call: 1
com.m520it.rxjava I/IT520: call: 1
com.m520it.rxjava I/IT520: doOnNext call: 2
com.m520it.rxjava I/IT520: call: 2
com.m520it.rxjava I/IT520: doOnNext call: 3
com.m520it.rxjava I/IT520: call: 3

Observable.just(1, 2, 3)
    // 订阅之前调用
    .doOnSubscribe(new Action0() {
        @Override
        public void call() {
            Log.i(TAG, "doOnSubscribe call ");
        }
    })
    .subscribe(new Action1<Integer>() {
        @Override
        public void call(Integer integer) {
            Log.i(TAG, "call: "+integer);
        }
    });

 I/IT520: doOnSubscribe call 
 I/IT520: call: 1
 I/IT520: call: 2
 I/IT520: call: 3

//每次发送之后 下一次发送不能超过2秒 如果超过则跳转到onError()
Observable.interval(2, TimeUnit.SECONDS)
        .timeout(2, TimeUnit.SECONDS)
        .subscribe(new Action1<Long>() {
            @Override
            public void call(Long aLong) {
                Log.i(TAG, "call: "+aLong);
            }
        }, new Action1<Throwable>() {
            @Override
            public void call(Throwable throwable) {
                //call throwable: null
                Log.i(TAG, "call throwable: " + throwable.getLocalizedMessage());
            }
        });

final Observable<Long> observable = Observable.using(new Func0<String>() {
    //创建一次性资源
    @Override
    public String call() {
        return "Hello Android !";
    }
}, new Func1<String, Observable<Long>>() {
    //创建被观察者
    @Override
    public Observable<Long> call(String s) {
        Log.i(TAG, "Func1 call: " + s);
        return Observable.interval(1, TimeUnit.SECONDS);
    }
}, new Action1<String>() {
    //用于销毁一次性资源
    @Override
    public void call(String s) {
        Log.i(TAG, "Action1 call: " + s);
    }
});

observable.subscribe(new Subscriber<Long>() {
    @Override
    public void onCompleted() {
        Log.i(TAG, "onCompleted: ");
    }

    @Override
    public void onError(Throwable e) {

    }

    @Override
    public void onNext(Long aLong) {
        Log.i(TAG, "onNext: "+aLong);
        //取消订阅后 才能执行被观察者的销毁资源方法
        unsubscribe();
    }
});